Type-writing machine.



' Patent ed Oct. I7, I899. I

r J. B. PRICE.

TYPE WRITING MACHINE.

(Application filed May 8, 1899.)

(No' Model.)

ugvZ-kesaas llrrrrnn Erarns Parent @rrrna JOHN B. PRICE, OF NEWARK, NEYVJERSEY, ASSIGNOR TO THE MANHATTAN TYPEl/VRITER COMPANY, OF NEW JERSEY.

TYPE-=WRITING MACHINE.

SPEGIFIGATION forming part of Letters Patent No. 635,079, dated October17, 1899. Application filed. May 8, 1899. Serial No. 716,0l5. (Nomodel.)

To all irritant H; may concern.-

Be it known that 1, JOHN B. PRICE, of Newark, county of Essex, and Stateof New Jersey, have invented an Improvementin Type-VVriting Machines, ofwhich the following description, in connection with the accompanyingdrawings, is a specification, like letters on the drawings representinglike parts.

The present invention relates to a typewriting machine, and is embodiedin a novel construction of the escapement or paper-carriage-feedmechanism, the invention consisting especially in a novel constructionof the letoff dog and its centering-spring.

The invention is shown as embodied in that form of escapement which isused in the Remington machine, in which form the retaining and let-offdogs move transversely across a rack or its equivalent properlyconnected with the paper-carriage.

In the escapement forming the subject of this invention the let-off dogis provided with a centering device which normally holds it in such aposition relative to the retainingdog that when the said retaining-dogis moved out of engagement with a tooth of the rack the let-off dog willbe moved into engagement with the rack, the said let-off dog being thencapable of independent movement, so as to permit the rack to advance thedistance between two teeth and to be arrested by the engagement of thelet-off dog with a stop at the end of such movement. Furthermore, whenthe carriage is restored or moved backward Without lifting the rack, asis often the case, provision is made for permitting the loose dog toyield in the opposite direction, so that the rack will ratchet along thesame without resistance. therefore operates to hold the loose dog whenleft to itself in the proper position with relation to the retaining-dogfor reengagement with the rack-teeth and also admits of a yieldingmovement of the said dog in either direction, as may be required in theoperation of the machine. 7

In accordance with the present invention the centering device comprisesa longitudinally-movable spring-pressed plunger havin g bearing-surfacesarranged to en gage corre The centering device sponding bearingsurfaceson the let-0E dog, one of the latter surfaces being at each side oftheaxisofthedogin thedirection ofmovement thereof. The said plunger iscontained in a guide-socket, shown as adjustably mounted, it beingobvious that by adjusting the position of the said socket the initialposition of the bearing-surfaces, and consequently that of the let-offdog, may be correspondingly adjusted. A movement of the said let-off dogin either direction, however, is permitted by the yielding of theplunger, whichin returning to its normal position immediately restoresthe said dog to its centered position when said dog is left to itself.

Figure 1 is a rear elevation of the papercarriage-feed mechanismembodying the invention; Fig. 2, .a similar view showing the parts in adifferent position; Fig. 3, a side elevation, the carriage-rack beingshown in section; and Fig. 4., a view similar to Fig. 1, showing theparts in the position assumed when the carriage is being moved backward.

The retaining-dog a and let-off dog Z), which are arranged to cooperatewith the carriage 7 5 rack A or its equivalent, (such as a toothed wheelgeared to the carriage,) are supported on a rocker member B, which isadapted to be rocked in response to a movement of any of the key-leversor of the space-bar lever to carry the dogs a and b transversely acrossthe rack A, so that as one of the said dogs moves out of engagement withsaid rack the other dog will be moved into en gagement therewith.

If, for example, the rocker B is moved when the parts are in theposition shown in Fig. 2,

the dog a will pass out of engagement with one of the teeth and the dogI) at the same time will come into engagement with the next tooth andwill then permit the carriage to move until the said dog (9 brings upagainst a suitable stop If. It is necessary, therefore, that the saiddog I) should be yieldingly held in the proper position to engage atooth of the rack in the movement of the rocker, and this isaccomplished in accordance with the present invention by the use of thecentering de vice c, which is provided with engaging surfaces ccooperating with corresponding en' gaging surfaces or portions Z9 formedon a we part of the dog b, one of said surfaces being at one side of theaxis or pivotal support 12 and the other at the other side thereof.

The centering device 0 is arranged to be pressed into engagement withthe surfaces 71 by means of a spring 0 shown as acting upon a plunger orstem 0 contained in a suitable guide 0 it being obvious that thetendency of the parts when left to themselves will be to assume theposition shown in Fig. 2-that is, with both sets of surfaces inengagement although the dog is free to yield in either direction when aforce is exerted at either side of the engaging end thereof. By thisconstruction, furthermore, it is obvious that the initial position ofthe let-off dog will depend upon the position of the plunger 0 so thatby adjusting the position of said plunger the initial posit-ion of thedog can be correspondinglyadjusted. Ashereinshown,theplungerguide orsocket is pivotally connected with the rocker B, the said socket 0 beingshown as provided with a projection 0 extending through a suitableopening in the rocker B and adapted to be held fixed in the said openingby means of a nut 0 To properly adjust the dog I), therefore, it isnecessary only to loosen the .nut c and to turn the socket a until thedirection of the plunger 0 is such as to properly position the dog I),the adjustment then being fixed by tightening the said nut. By thisconstruction the dog is properly held in its initial position, can bereadily adjusted, and will not be affected (so far as its properoperation is concerned) by a slight weakening of the spring, as might bethe case when the action of the spring is not such as to provide in thesame way for the yielding of the dog in either direction.

I claim 1. In a type-Writing machine, the combination with aretaining-dog; of a pivotallysupported let-off dog provided withengaging surfaces, one at each side of its axis; a centering devicecomprising a plunger provided with corresponding engaging surfaces oneat each side; a guide-socket for said plunger; and a spring adapted topress said plunger outward with relation to said guidesocket to maintainthe same in engagement with the said dog, as set forth.

2. The combination with the retaining-dog; of the pivotally-supportedlet-off dog provided with engaging surfaces one at each side of itsaxis; a centering device comprising a plunger provided withcorresponding engaging surfaces, one at each side thereof; aguide-socket for said plunger; a spring adapted to press said plungeroutward with relation to said guide-socket to maintain the same inengagement with the said dog; and means for adjusting the said socket tovary the direction in which the said plunger is pressed, substantiallyas described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

JOHN B. PRICE.

Witnesses:

FRANK A. LEMAL, FRED KELLY.

